The **MV25T1AD-R** is a high-performance, surface-mount (SMD) **Voltage Controlled Temperature Compensated Crystal Oscillator (VCTCXO)**. It is primarily used in telecommunications and navigation systems where high frequency stability is critical despite changes in temperature or voltage. --- ### ## Technical Specifications The following table summarizes the key electrical and physical characteristics of the MV25T1AD-R: | Parameter | Specification | | :--- | :--- | | **Component Type** | VCTCXO (Voltage Controlled Temperature Compensated Crystal Oscillator) | | **Nominal Frequency** | Typically 25.000 MHz (Refer to specific batch) | | **Supply Voltage (Vcc)** | 3.3V (Standard) | | **Output Type** | Clipped Sine Wave / CMOS (depending on configuration) | | **Frequency Stability** | ±0.5 ppm to ±2.5 ppm | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Package Size** | 2.5mm x 2.0mm (Ultra-miniature) | | **Mounting Type** | Surface Mount (SMD) | --- ### ## Key Features 1. **Temperature Compensation:** Unlike standard oscillators, it includes internal circuitry that senses temperature changes and adjusts the crystal's frequency to keep it stable. 2. **Voltage Control (VC):** The "V" in VCTCXO indicates it has a control pin. By applying a small voltage (typically 0.5V to 2.5V), the user can "pull" or fine-tune the output frequency. 3. **Low Phase Noise:** Designed for high-speed data transmission, minimizing jitter and signal interference. 4. **Compact Footprint:** Its 2520 (2.5x2.0mm) size makes it ideal for portable electronics and space-constrained PCB designs. --- ### ## Typical Applications * **Wireless Communication:** Base stations, small cells, and Wi-Fi 6 routers. * **GPS/GNSS:** High-precision positioning modules where timing accuracy is vital for satellite locking. * **IoT Devices:** Low-power wide-area networks (LPWAN) requiring stable clocking over long periods. * **Optical Networking:** Synchronous Ethernet and SONET/SDH equipment. --- ### ## Pin Configuration (General 4-Pin Layout) | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | Vc | Voltage Control (Frequency Tuning) | | **2** | GND | Ground | | **3** | Output | RF Frequency Output | | **4** | Vcc | Power Supply | ---